Frans de Waal, a Dutch-born zoologist specializing in primate behavior, takes on those who have declared ethics uniquely human. Making a compelling case for morality grounded in biology, he shows that ethical behavior in humans and animals alike is as much a matter of evolution as any other trait. photo inserts.
^Frans De WaalGood Natured : The Origins of Right and Wrong in Humans and Other Animals by Frans De Waal (1997, Paperback, Reprint)ISBN 9780674356610 (revised Jan 2019)
^Waal, F. B. M. De (2014). Good Natured : The Origins of Right and Wrong in Humans and Other Animals, Harvard Univ Pr. BiggerBooks. ISBN 9780674356610 (revised Nov 2023)
^ (2013). Good Natured : The Origins of Right and Wrong in Humans and Other AnimalsECampus. ISBN 9780674356610 (revised Jan 2019)